氯化石蜡
同族
环境化学
微粒
环境科学
三角洲
污染
持久性有机污染物
化学
生态学
生物
有机化学
工程类
航空航天工程
作者
Jingwen Huang,Lei Zhao,Yumeng Shi,Xiao‐Wen Zeng,Wei Sun,Xianglong Zhao,Ruqing Liu,Qi-Zhen Wu,Guang‐Hui Dong,Da Chen,Xiaotu Liu
标识
DOI:10.1016/j.envint.2023.107932
摘要
Research on the environmental occurrence of long-chain chlorinated paraffins (LCCPs) in ambient fine particulate matter (PM2.5) is still scarce. In the present study, short-chain chlorinated paraffins (SCCPs), medium-chain chlorinated paraffins (MCCPs) and LCCPs were simultaneously quantified and profiled in PM2.5 samples collected from 96 primary or secondary schools in the Pearl River Delta of South China. SCCPs, MCCPs and LCCPs were detected in higher than 90% samples with concentrations in the range of 0.832-109, 1.02-110, and 0.173-17.4 ng/m3, respectively. The dominant congener groups of SCCPs, MCCPs and LCCPs were C13Cl6-8, C14Cl7-8, and C18Cl7-9, respectively. The concentrations of SCCPs and MCCPs were higher in summer than in winter, while an opposite seasonal trend was observed for LCCPs. Principal components analysis showed there were seasonal variations in the congener group patterns with C13Cl6-7 and C14Cl7 more abundant in summer than in winter. Concentrations of CPs also exhibited slight spatial variations. Exposure risk assessment based on different age groups suggested exposure to PM2.5-associated CPs would not pose significant health risk. The present study expands the existing knowledge of CPs contamination in atmospheric environment.
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